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scsi: scsi_debug: Zero clear zones at reset write pointer

Message ID 20211119102204.259762-1-shinichiro.kawasaki@wdc.com
State New
Headers show
Series scsi: scsi_debug: Zero clear zones at reset write pointer | expand

Commit Message

Shin'ichiro Kawasaki Nov. 19, 2021, 10:22 a.m. UTC 
When reset write pointer is requested to scsi_debug devices with zoned
model, positions of write pointers are reset, but the data in the target
zones are not cleared. Read to the zones returns data written before the
reset write pointer. This unexpected left data is confusing and does not
allow using scsi_debug for stale page cache test of the BLKRESETZONE
ioctl. Hence, zero clear the target zones at reset write pointer.

Fixes: f0d1cf9378bd ("scsi: scsi_debug: Add ZBC zone commands")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
---
 drivers/scsi/scsi_debug.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 1d0278da9041..6d1f1a4a6724 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -4653,6 +4653,7 @@  static void zbc_rwp_zone(struct sdebug_dev_info *devip,
 			 struct sdeb_zone_state *zsp)
 {
 	enum sdebug_z_cond zc;
+	struct sdeb_store_info *sip = devip2sip(devip, false);
 
 	if (zbc_zone_is_conv(zsp))
 		return;
@@ -4667,6 +4668,9 @@  static void zbc_rwp_zone(struct sdebug_dev_info *devip,
 	zsp->z_non_seq_resource = false;
 	zsp->z_wp = zsp->z_start;
 	zsp->z_cond = ZC1_EMPTY;
+
+	memset(sip->storep + zsp->z_start * sdebug_sector_size, 0,
+	       devip->zsize * sdebug_sector_size);
 }
 
 static void zbc_rwp_all(struct sdebug_dev_info *devip)